An ancient phrase beginning time of Muhammed and Gabriel of ancient Islam history. It means, upon last night I most certainly had sexual intercourse with all members of you interelated family. A horrible insult.

Gabriel: Before I give you the recitings of God, I must tell you that I put the impin' in the pimpin' last night.
Muhammed: Surely not all of them in one night!?!?
Gabriel: Fo' shizzle my nizzle.